Display device and method of manufacturing the same
AssigneeKabushiki Kaisha Toshiba
InventorsMichiya Kobayashi, Kazushige Yamamoto
Life of this patent
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Abstract
An active matrix type planar display device includes display elements arranged in a matrix and auxiliary wiring elements. The display element has an optical active layer between a first electrode formed on a substrate and a second electrode. The auxiliary wiring element is formed in the same layer or on the same surface as the first electrode, electrically insulated from the first electrode, and electrically connected to the second electrode.
Claims14
A display device comprising a plurality of scan signal lines arranged on a substrate, a plurality of video signal lines arranged substantially perpendicular to the scan signal lines, switching elements disposed near intersections between the scan signal lines and the video signal lines, and display elements each having an optical active layer formed in an insular shape between a first electrode connected to the switching element and a second electrode disposed to oppose the first electrode, the display elements being arranged in a matrix,
- wherein the display device further comprises an auxiliary wiring element formed in the same layer or on the same surface as the first electrode, electrically insulated from the first electrode, and electrically connected to the second electrode.
A method of manufacturing a display device wherein display elements, each having an optical active layer between a first electrode formed on a substrate and a second electrode disposed to oppose the first electrode, are arranged in a matrix, the method comprising the steps of:
- forming the first electrode and an auxiliary wiring element of a conductive material in one step;
- forming an insulating film having a region that exposes the first electrode and the auxiliary wiring element;
- forming the optical active layer in the region of the insulating film, which exposes the first electrode;
- and
- disposing a light-transmissive conductive film over substantially an entire surface of the substrate to form the second electrode that is opposed to the first electrode via the optical active layer and electrically connected to the auxiliary wiring element.
A display device comprising a plurality of scan signal lines arranged on a substrate, a plurality of video signal lines arranged substantially perpendicular to the scan signal lines, switching elements disposed near intersections between the scan signal lines and the video signal lines, and display elements each having an optical active layer formed in an insular shape between a first electrode connected to the switching element and a second electrode disposed to oppose the first electrode, the display elements being arranged in a matrix,
- wherein the first electrode is formed independently for each of the display elements, and the second electrode is formed commonly for the display elements, and
- auxiliary wiring elements that are electrically insulated from the first electrode and electrically connected to the second electrode are arranged more densely in a central area than in a peripheral area within a surface of the substrate.
A method of manufacturing a display device wherein display elements, each having an optical active layer between an anode formed on a substrate and a cathode disposed to oppose the anode, are arranged in a matrix, the method comprising the steps of:
- forming the anode of a conductive material in an insular shape;
- forming an auxiliary wiring element of a conductive material;
- forming the optical active layer on the anode;
- and
- disposing a light-transmissive conductive film over substantially an entire surface of the substrate to form the cathode that is opposed to the anode via the optical active layer and electrically connected to the auxiliary wiring element.
Dependencies are inferred from the claim text.